The product technology of high strength stainless steel precision strip is recognized as the core technology of high precision in the field of stainless steel production. Due to its precision tolerance, mechanical properties , surface roughness, brightness, hardness and other indicators are very demanding, and become a unique top products in the strip industry.
1, The concept of stainless steel precision strip, generally the thickness of 0.01 -1.5mm, the strength of 600 -2100N/mm2 stainless steel and heat-resistant cold-rolled stainless steel strip is defined as high strength stainless steel precision strip. This overlaps with the size of cold rolled strip steel (longitudinal shear strip) with a thickness of 0.3 -1.5mm, but only special rolled products and longitudinal cut products can meet the special requirements of precision strip steel. 2, High strength stainless steel precision strip steel belongs to the field of stainless steel specialization, considering the need for many parameters to measure, and the current production standards of stainless steel precision strip steel in China's specific situation, the characteristics of precision strip steel made the following definition. Width below 600mm; Thickness accuracy +/-0.001 mm, width accuracy +/ -0.1 mm(toyo standard). Surface quality can meet the needs of different users, such as roughness Ra less than or equal to 0.16. Surface 2B of mm, roughness Ra less than or equal to 0.05. Mm BA surface or other special surface. High mechanical properties are required, and low or high yield stress or strength can be specified according to different requirements of users. The grain size is uniform, and the grain size in the fully annealed state is generally controlled between 7.0 and 9.0. For hard products, the strength performance is very uniform, and the hardness fluctuates between plus or minus 5 -10Hv. In addition to the flatness, edge quality and other aspects have higher requirements.
3. Production standard there is no international or national standard for the production of stainless steel precision strip steel at present and many production plants are equivalent to the cold-rolled stainless steel standard or establish their own production standard according to the needs of users. Through visiting and investigating excellent precision strip production and processing enterprises at home and abroad, it is believed that each precision strip production factory has strict requirements on the allowable deviation of product thickness (high + / -0.001mm) and can strictly meet the needs of different users (different precision control), but there is no unified standard for the allowable deviation of thickness (each has enterprise standard).